ponytail is by DietrichGebert — not by us.
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Indexed Sep 19, 2026 · 142,516 stars at index time. Maintainers: claiming verifies your identity and unlocks a higher assurance tier. Removal requests are honored.
AI agent · for humans & their agents
ponytail
unclaimed listingactively maintainedFreeMIT
Makes your AI agent think like the laziest senior dev in the room. The best code is the code you never wrote.
by Open Source Community · New publisher
Every claim on this page is refundable if it is untrue — refund policy.
DietrichGebert/ponytail is an open-source project by DietrichGebert: Makes your AI agent think like the laziest senior dev in the room. The best code is the code you never wrote.. Indexed here so it can be found — not resold.
It is free. Get it from the upstream repository: https://github.com/DietrichGebert/ponytail
From the project's own README (excerpt, reproduced for discovery under its MIT license):
Ponytail
He says nothing. He writes one line. It works.
~54% less code (up to 94%) · ~20% cheaper · ~27% faster · 100% safe Measured on real Claude Code sessions editing a real open-source repo (FastAPI + React), against the same agent with no skill. ~54% is the mean across 12 feature tasks (Haiku 4.5, n=4); it reaches 94% where an agent over-builds (a date picker) and is near zero where the code is already minimal. ponytail keeps every safety guard while a bare "write one-liners" prompt drops one. (The earlier single-shot benchmark reported 80-94% as a flat figure; against a fair agentic baseline that is the per-task ceiling, not the average.) Full writeup · reproduce it .
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Already built with Ponytail
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You know him. Long ponytail. Oval glasses. Has been at the company longer than the version control. You show him fifty lines; he looks at them, says nothing, and replaces them with one.
Ponytail puts him inside your AI agent.
Before / after
You ask for a date picker. Your agent installs flatpickr, writes a wrapper component, adds a stylesheet, and starts a discussion about timezones.
With ponytail:
More survivors in examples/.
Numbers
The honest measurement is a real agent doing real work: a headless Claude Code session editing tiangolo's full-stack-fastapi-template (a real FastAPI + React repo), scored on the git diff it leaves behind. Twelve feature tickets, the same agent with and without the skill, n=4, Haiku 4.5.
vs no-skill baseline LOC tokens cost time safe --- --: --: --: --: --: ponytail -54% -22% -20% -27% 100% caveman (terse-prose control) -20% +7% +3% +2% 100% "YAGNI + one-liners" prompt -33% -14%…
Preview
See what it does before you commit. Previews show behavior, never source code.
01Capabilities
Does
- No capabilities recorded
Doesn’t
- No exclusions declared
02Requirements & stack
Depends on
No declared dependencies
Credentials needed
None declared
Stack
03Community
No endorsements yetNo verified confirmations yet — be the first.
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Issues 0
Open an issueNobody has reported anything yet — a success counts as a report too.
04Trust Passport
Full passport →0/0 automated components pass. An automated score is never a security guarantee.
This listing is unclaimed, so publisher identity cannot be verified and it stays below the “verified” tier by design — that is a statement about the listing, not about the project’s quality. Our automated scans still ran; a maintainer who claims it unlocks identity verification.
05Versions
Full history →| Version | Channel | Released | Notes |
|---|---|---|---|
| 0.0.0 | stable | Sep 19, 2026 | Indexed listing — see the upstream repository for real release history. |